共同特征：自助式服务，自然获取用户，达到网络效应的临界质量，失控的用户增长速度，赢家通吃的市场环境，复杂的用户体验，网络效应，以创造新的用户社交互动方式为典型。

Common characteristics: self service customer acquisition, critical mass, runaway user growth, winner take all markets, complex ux, network effects, typically create new ways for people to interact.

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